/**
* Get base field value
*
* Some fields need to be saved as serialized arrays. Getting
* the field by the base value is used by Fields to populate
* their values.
*
* @param $field_name
*
* @return null
*/
protected function getBaseFieldValue($field_name)
{
$data = $this->field->getForm()->getModel()->{$field_name};
return $this->getValueOrNull($data);
}
